I am trying to install two toggle switches with LED on my truck one for my manual torque converter lock up and one for my water meth. The switches have 3 posts two on one side and one lone one. I want the LED on the lockup switch to be on when it is on. And I want the LED on the switch for the water meth to be on when the system is spraying. I have tried every combination i can think of and have gotten every possible scenerio except the ones i want. Right now both switched work but no LEDs. Any ideas?

The water meth one will only work if you have a double pole switch... You would be better off to have the LED on the switch light when the system is on, and a second one that lights when the pump is pumping...

Well both my toggle switch work as in the one turns the pump on and off and the other locks the torque converter but what I am not sure about is whether the toggle switch has two hot posts and one ground or vice versa. I almost think if I run a hot wire from somewhere else on the truck to the one post they will both light up when turned to on.

Well both my toggle switch work as in the one turns the pump on and off and the other locks the torque converter but what I am not sure about is whether the toggle switch has two hot posts and one ground or vice versa. I almost think if I run a hot wire from somewhere else on the truck to the one post they will both light up when turned to on.

One should be power in, one is power out and one is a ground... There is no way to do what you want with the switch you have, as far as the water injection. If you want the LED in the switch to light up when the switch is on you need to ground one of the prongs... I dont know what one it would be but.

my guess is that 1 is the ground to make the light go on, and 2 and 3 are the power route. could put power supply on either one, just depends on what direction you want the switch to be when the system is "on"

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